Build fails on ARM64

[kit-ty-kate]

Currently core.v0.11.0 (and previous versions) fail to build on ARM64. Here is the build log:

+ /home/opam/.opam/4.05.0/bin/jbuilder "build" "-p" "core" "-j" "95" (CWD=/home/opam/.opam/4.05.0/.opam-switch/build/core.v0.11.0)
-     discover src/config.h (exit 2)
- (cd _build/default/src && ./config/discover.exe -ocamlc /home/opam/.opam/4.05.0/bin/ocamlc.opt)
- run: /home/opam/.opam/4.05.0/bin/ocamlc.opt -config
- -> process exited with code 0
- -> stdout:
-  | version: 4.05.0
-  | standard_library_default: /home/opam/.opam/4.05.0/lib/ocaml
-  | standard_library: /home/opam/.opam/4.05.0/lib/ocaml
-  | standard_runtime: /home/opam/.opam/4.05.0/bin/ocamlrun
-  | ccomp_type: cc
-  | bytecomp_c_compiler: gcc -O2 -fno-strict-aliasing -fwrapv -D_FILE_OFFSET_BITS=64 -D_REENTRANT -fPIC
-  | bytecomp_c_libraries: -lm  -ldl  -lpthread                  
-  | native_c_compiler: gcc -O2 -fno-strict-aliasing -fwrapv -D_FILE_OFFSET_BITS=64 -D_REENTRANT
-  | native_c_libraries: -lm  -ldl
-  | native_pack_linker: ld -r  -o 
-  | ranlib: ranlib
-  | cc_profile: -pg
-  | architecture: arm64
-  | model: default
-  | int_size: 63
-  | word_size: 64
-  | system: linux
-  | asm: as
-  | asm_cfi_supported: true
-  | with_frame_pointers: false
-  | ext_exe: 
-  | ext_obj: .o
-  | ext_asm: .s
-  | ext_lib: .a
-  | ext_dll: .so
-  | os_type: Unix
-  | default_executable_name: a.out
-  | systhread_supported: true
-  | host: aarch64-unknown-linux-gnu
-  | target: aarch64-unknown-linux-gnu
-  | profiling: false
-  | flambda: false
-  | spacetime: false
-  | safe_string: false
-  | exec_magic_number: Caml1999X011
-  | cmi_magic_number: Caml1999I021
-  | cmo_magic_number: Caml1999O011
-  | cma_magic_number: Caml1999A012
-  | cmx_magic_number: Caml1999Y015
-  | cmxa_magic_number: Caml1999Z014
-  | ast_impl_magic_number: Caml1999M020
-  | ast_intf_magic_number: Caml1999N018
-  | cmxs_magic_number: Caml2007D002
-  | cmt_magic_number: Caml2012T009
- -> stderr:
- compiling c program:
-  | 
-  | #include <time.h>
-  | 
-  | int main()
-  | {
-  |   struct timespec ts;
-  |   clock_gettime(CLOCK_REALTIME, &ts);
-  |   clock_settime(CLOCK_REALTIME, &ts);
-  |   clock_getres(CLOCK_REALTIME, &ts);
-  |   return 0;
-  | }
- run: gcc -O2 -fno-strict-aliasing -fwrapv -D_FILE_OFFSET_BITS=64 -D_REENTRANT -fPIC '-I' '/home/opam/.opam/4.05.0/lib/ocaml' '-o' '/tmp/ocaml-configurator663edd/c-test-1/test.exe' '/tmp/ocaml-configurator663edd/c-test-1/test.c' '-lrt'
- -> process exited with code 0
- -> stdout:
- -> stderr:
- compiling c program:
-  | 
-  | #define JSC_THREAD_ID_METHOD 1
-  | #include "/home/opam/.opam/4.05.0/.opam-switch/build/core.v0.11.0/_build/default/src/thread_id.h"
-  | 
-  | int main ()
-  | {
-  |   GET_THREAD_ID;
-  |   return 0;
-  | }
- run: gcc -O2 -fno-strict-aliasing -fwrapv -D_FILE_OFFSET_BITS=64 -D_REENTRANT -fPIC '-I' '/home/opam/.opam/4.05.0/lib/ocaml' '-o' '/tmp/ocaml-configurator663edd/c-test-3/test.exe' '/tmp/ocaml-configurator663edd/c-test-3/test.c'
- -> process exited with code 0
- -> stdout:
- -> stderr:
-  | In file included from /tmp/ocaml-configurator663edd/c-test-3/test.c:3:0:
-  | /tmp/ocaml-configurator663edd/c-test-3/test.c: In function 'main':
-  | /home/opam/.opam/4.05.0/.opam-switch/build/core.v0.11.0/_build/default/src/thread_id.h:11:23: warning: implicit declaration of function 'syscall' [-Wimplicit-function-declaration]
-  |  #define GET_THREAD_ID syscall(SYS_gettid)
-  |                        ^
-  | /tmp/ocaml-configurator663edd/c-test-3/test.c:7:3: note: in expansion of macro 'GET_THREAD_ID'
-  |    GET_THREAD_ID;
-  |    ^~~~~~~~~~~~~
- compiling c program:
-  | 
-  | #include <sys/eventfd.h>
-  | 
-  | int main()
-  | {
-  |   int fd = eventfd(0, 0);
-  |   return 0;
-  | }
- run: gcc -O2 -fno-strict-aliasing -fwrapv -D_FILE_OFFSET_BITS=64 -D_REENTRANT -fPIC '-I' '/home/opam/.opam/4.05.0/lib/ocaml' '-o' '/tmp/ocaml-configurator663edd/c-test-5/test.exe' '/tmp/ocaml-configurator663edd/c-test-5/test.c'
- -> process exited with code 0
- -> stdout:
- -> stderr:
- compiling c program:
-  | 
-  | #include <sys/timerfd.h>
-  | 
-  | int main()
-  | {
-  |   timerfd_create(0, 0);
-  |   return 0;
-  | }
- run: gcc -O2 -fno-strict-aliasing -fwrapv -D_FILE_OFFSET_BITS=64 -D_REENTRANT -fPIC '-I' '/home/opam/.opam/4.05.0/lib/ocaml' '-o' '/tmp/ocaml-configurator663edd/c-test-7/test.exe' '/tmp/ocaml-configurator663edd/c-test-7/test.c'
- -> process exited with code 0
- -> stdout:
- -> stderr:
- compiling c program:
-  | 
-  | #include <wordexp.h>
-  | 
-  | int main()
-  | {
-  |   wordexp_t w;
-  |   wordexp("", &w, 0);
-  |   return 0;
-  | }
- run: gcc -O2 -fno-strict-aliasing -fwrapv -D_FILE_OFFSET_BITS=64 -D_REENTRANT -fPIC '-I' '/home/opam/.opam/4.05.0/lib/ocaml' '-o' '/tmp/ocaml-configurator663edd/c-test-9/test.exe' '/tmp/ocaml-configurator663edd/c-test-9/test.c'
- -> process exited with code 0
- -> stdout:
- -> stderr:
- compiling c program:
-  | 
-  | #include <sys/types.h>
-  | #include <sys/socket.h>
-  | 
-  | int main()
-  | {
-  |    send(0, "", 0, MSG_NOSIGNAL);
-  |    return 0;
-  | }
- run: gcc -O2 -fno-strict-aliasing -fwrapv -D_FILE_OFFSET_BITS=64 -D_REENTRANT -fPIC '-I' '/home/opam/.opam/4.05.0/lib/ocaml' '-o' '/tmp/ocaml-configurator663edd/c-test-11/test.exe' '/tmp/ocaml-configurator663edd/c-test-11/test.c'
- -> process exited with code 0
- -> stdout:
- -> stderr:
- compiling c program:
-  | 
-  | #include <sys/types.h>
-  | #include <sys/socket.h>
-  | 
-  | int main()
-  | {
-  |    send(0, "", 0, SO_NOSIGPIPE);
-  |    return 0;
-  | }
- run: gcc -O2 -fno-strict-aliasing -fwrapv -D_FILE_OFFSET_BITS=64 -D_REENTRANT -fPIC '-I' '/home/opam/.opam/4.05.0/lib/ocaml' '-o' '/tmp/ocaml-configurator663edd/c-test-13/test.exe' '/tmp/ocaml-configurator663edd/c-test-13/test.c'
- -> process exited with code 1
- -> stdout:
- -> stderr:
-  | /tmp/ocaml-configurator663edd/c-test-13/test.c: In function 'main':
-  | /tmp/ocaml-configurator663edd/c-test-13/test.c:7:19: error: 'SO_NOSIGPIPE' undeclared (first use in this function)
-  |     send(0, "", 0, SO_NOSIGPIPE);
-  |                    ^~~~~~~~~~~~
-  | /tmp/ocaml-configurator663edd/c-test-13/test.c:7:19: note: each undeclared identifier is reported only once for each function it appears in
- compiling c program:
-  | 
-  | #include <unistd.h>
-  | 
-  | int main()
-  | {
-  |   fdatasync(0);
-  |   return 0;
-  | }
- run: gcc -O2 -fno-strict-aliasing -fwrapv -D_FILE_OFFSET_BITS=64 -D_REENTRANT -fPIC '-I' '/home/opam/.opam/4.05.0/lib/ocaml' '-o' '/tmp/ocaml-configurator663edd/c-test-15/test.exe' '/tmp/ocaml-configurator663edd/c-test-15/test.c'
- -> process exited with code 0
- -> stdout:
- -> stderr:
- compiling c program:
-  | 
-  | #define _GNU_SOURCE
-  | #include <sys/socket.h>
-  | 
-  | int main () {
-  |   recvmmsg(0, 0, 0, 0, 0);
-  |   return 0;
-  | }
- run: gcc -O2 -fno-strict-aliasing -fwrapv -D_FILE_OFFSET_BITS=64 -D_REENTRANT -fPIC '-I' '/home/opam/.opam/4.05.0/lib/ocaml' '-o' '/tmp/ocaml-configurator663edd/c-test-17/test.exe' '/tmp/ocaml-configurator663edd/c-test-17/test.c'
- -> process exited with code 0
- -> stdout:
- -> stderr:
- compiling c program:
-  | 
-  | #include <pthread.h>
-  | #include <time.h>
-  | 
-  | int main()
-  | {
-  |    pthread_mutex_t m;
-  |    struct timespec ts;
-  |    pthread_mutex_timedlock(&m, &ts);
-  |    return 0;
-  | }
- run: gcc -O2 -fno-strict-aliasing -fwrapv -D_FILE_OFFSET_BITS=64 -D_REENTRANT -fPIC '-I' '/home/opam/.opam/4.05.0/lib/ocaml' '-o' '/tmp/ocaml-configurator663edd/c-test-19/test.exe' '/tmp/ocaml-configurator663edd/c-test-19/test.c' '-lpthread'
- -> process exited with code 0
- -> stdout:
- -> stderr:
- compiling c program:
-  | 
-  | #include <pthread.h>
-  | #include <time.h>
-  | 
-  | int main()
-  | {
-  |    clockid_t clock;
-  |    pthread_getcpuclockid(pthread_self(), &clock);
-  |    return 0;
-  | }
- run: gcc -O2 -fno-strict-aliasing -fwrapv -D_FILE_OFFSET_BITS=64 -D_REENTRANT -fPIC '-I' '/home/opam/.opam/4.05.0/lib/ocaml' '-o' '/tmp/ocaml-configurator663edd/c-test-21/test.exe' '/tmp/ocaml-configurator663edd/c-test-21/test.c' '-lpthread'
- -> process exited with code 0
- -> stdout:
- -> stderr:
- compiling c program:
-  | 
-  | #include <stdlib.h>
-  | 
-  | int main () {
-  |   mkostemp("", 0);
-  |   return 0;
-  | }
- run: gcc -O2 -fno-strict-aliasing -fwrapv -D_FILE_OFFSET_BITS=64 -D_REENTRANT -fPIC '-I' '/home/opam/.opam/4.05.0/lib/ocaml' '-o' '/tmp/ocaml-configurator663edd/c-test-23/test.exe' '/tmp/ocaml-configurator663edd/c-test-23/test.c'
- -> process exited with code 0
- -> stdout:
- -> stderr:
-  | /tmp/ocaml-configurator663edd/c-test-23/test.c: In function 'main':
-  | /tmp/ocaml-configurator663edd/c-test-23/test.c:5:3: warning: implicit declaration of function 'mkostemp' [-Wimplicit-function-declaration]
-  |    mkostemp("", 0);
-  |    ^~~~~~~~
- compiling c program:
-  | #include <stdio.h>
-  | #include <sys/resource.h>
-  | 
-  | int main()
-  | {
-  | #if defined(RLIMIT_AS)
-  |   printf("RLIMIT_AS=b:true\n");
-  | #else
-  |   printf("RLIMIT_AS=b:false\n");
-  | #endif
-  | #if defined(RLIMIT_NICE)
-  |   printf("RLIMIT_NICE=b:true\n");
-  | #else
-  |   printf("RLIMIT_NICE=b:false\n");
-  | #endif
-  |   return 0;
-  | }
- run: gcc -O2 -fno-strict-aliasing -fwrapv -D_FILE_OFFSET_BITS=64 -D_REENTRANT -fPIC '-I' '/home/opam/.opam/4.05.0/lib/ocaml' '-o' '/tmp/ocaml-configurator663edd/c-test-25/test.exe' '/tmp/ocaml-configurator663edd/c-test-25/test.c'
- -> process exited with code 0
- -> stdout:
- -> stderr:
- run: /tmp/ocaml-configurator663edd/c-test-25/test.exe
- -> process exited with code 0
- -> stdout:
-  | RLIMIT_AS=b:true
-  | RLIMIT_NICE=b:true
- -> stderr:
- compiling c program:
-  | #include <stdio.h>
-  | #include <caml/config.h>
-  | 
-  | int main()
-  | {
-  | #if defined(ARCH_BIG_ENDIAN)
-  |   printf("ARCH_BIG_ENDIAN=b:true\n");
-  | #else
-  |   printf("ARCH_BIG_ENDIAN=b:false\n");
-  | #endif
-  | #if defined(ARCH_SIXTYFOUR)
-  |   printf("ARCH_SIXTYFOUR=b:true\n");
-  | #else
-  |   printf("ARCH_SIXTYFOUR=b:false\n");
-  | #endif
-  |   return 0;
-  | }
- run: gcc -O2 -fno-strict-aliasing -fwrapv -D_FILE_OFFSET_BITS=64 -D_REENTRANT -fPIC '-I' '/home/opam/.opam/4.05.0/lib/ocaml' '-o' '/tmp/ocaml-configurator663edd/c-test-28/test.exe' '/tmp/ocaml-configurator663edd/c-test-28/test.c'
- -> process exited with code 0
- -> stdout:
- -> stderr:
- run: /tmp/ocaml-configurator663edd/c-test-28/test.exe
- -> process exited with code 0
- -> stdout:
-  | ARCH_BIG_ENDIAN=b:false
-  | ARCH_SIXTYFOUR=b:true
- -> stderr:
- Fatal error: exception (runtime-lib/runtime.ml.E "comparison failed"
-   ((switch true) vs (switch false) (Loc src/config/discover.ml:205:15)))
- Raised at file "src/import0.ml" (inlined), line 351, characters 22-32
- Called from file "src/configurator.ml", line 511, characters 13-22
- Called from file "src/config/discover.ml", line 136, characters 2-1023
[ERROR] The compilation of core failed at "/home/opam/.opam/4.05.0/bin/jbuilder build -p core -j 95".

Complete build log here: https://arm64.ci.ocamllabs.io/log/saved/docker-run-290f1d15e8c68cb17b235fea3615552c/9b25b672beab25dfc640707bea6a8541fa815f65

[vbmithr]

Now I have:

# context     2.0.0~rc3 | linux/arm64 | ocaml-base-compiler.4.06.1 | https://opam.ocaml.org/2.0#19a8c9ad
# path        ~/.opam/vb/.opam-switch/build/core.v0.11.1
# command     ~/.opam/opam-init/hooks/sandbox.sh build jbuilder build -p core -j 4
# exit-code   1
# env-file    ~/.opam/log/core-13385-d474c2.env
# output-file ~/.opam/log/core-13385-d474c2.out
### output ###
# [...]
# -> stderr:
# run: /tmp/ocaml-configurator0f1b65/c-test-28/test.exe
# -> process exited with code 0
# -> stdout:
#  | ARCH_BIG_ENDIAN=b:false
#  | ARCH_SIXTYFOUR=b:true
# -> stderr:
# Fatal error: exception (runtime-lib/runtime.ml.E "comparison failed"
#   ((switch true) vs (switch false) (Loc src/config/discover.ml:205:15)))
# Raised at file "src/import0.ml" (inlined), line 351, characters 22-32
# Called from file "src/configurator.ml", line 511, characters 13-22
# Called from file "src/config/discover.ml", line 136, characters 2-1023```

[vbmithr]

@hhugo Any chance to get this fixed?

[billtohara]

FWIW, the build is stopped because of this line which asserts that if the platform is 64-bit, it must be x86:

https://github.com/janestreet/core/blob/master/src/config/discover.ml#L207

If you comment out this check, it gets pretty far and then breaks as follows. I don't know enough ocaml or about the library to hazard a guess. Though I have applications I'd love to compile on the ARM64 that need it.

jbuilder build @install
      ocamlc src/.core.objs/core__Core_time_intf.{cmi,cmo,cmt} (exit 2)
(cd _build/default && /opt/opam/4.06.1/bin/ocamlc.opt -w -40 -g -bin-annot -I src/.core.objs -I /opt/opam/4.06.1/lib/base -I /opt/opam/4.06.1/lib/base/caml -I /opt/opam/4.06.1/lib/base/md5 -I /opt/opam/4.06.1/lib/base/shadow_stdlib -I /opt/opam/4.06.1/lib/bin_prot -I /opt/opam/4.06.1/lib/bin_prot/shape -I /opt/opam/4.06.1/lib/core_kernel -I /opt/opam/4.06.1/lib/core_kernel/base_for_tests -I /opt/opam/4.06.1/lib/fieldslib -I /opt/opam/4.06.1/lib/jane-street-headers -I /opt/opam/4.06.1/lib/ocaml/threads -I /opt/opam/4.06.1/lib/parsexp -I /opt/opam/4.06.1/lib/ppx_assert/runtime-lib -I /opt/opam/4.06.1/lib/ppx_bench/runtime-lib -I /opt/opam/4.06.1/lib/ppx_compare/runtime-lib -I /opt/opam/4.06.1/lib/ppx_expect/collector -I /opt/opam/4.06.1/lib/ppx_expect/common -I /opt/opam/4.06.1/lib/ppx_expect/config -I /opt/opam/4.06.1/lib/ppx_hash/runtime-lib -I /opt/opam/4.06.1/lib/ppx_inline_test/config -I /opt/opam/4.06.1/lib/ppx_inline_test/runtime-lib -I /opt/opam/4.06.1/lib/ppx_sexp_conv/runtime-lib -I /opt/opam/4.06.1/lib/sexplib -I /opt/opam/4.06.1/lib/sexplib/unix -I /opt/opam/4.06.1/lib/sexplib0 -I /opt/opam/4.06.1/lib/spawn -I /opt/opam/4.06.1/lib/splittable_random -I /opt/opam/4.06.1/lib/stdio -I /opt/opam/4.06.1/lib/typerep -I /opt/opam/4.06.1/lib/variantslib -no-alias-deps -open Core__ -o src/.core.objs/core__Core_time_intf.cmo -c -impl src/core_time_intf.pp.ml)
File "src/core_time_intf.ml", line 10, characters 17-43:
Error: Unbound module type Time.S_kernel_without_zone
    ocamlopt src/.core.objs/core__Iobuf.{cmx,o}
File "src/iobuf.ml", line 998, characters 4-62:
Warning 55: Cannot inline: Function information unavailable
Makefile:5: recipe for target 'default' failed
make: *** [default] Error 1

[ghost]

It seems that this variable is no longer used in our source tree, I'm removing it

[argent-smith]

Here's my case.

[ERROR] The compilation of core failed at "/home/dev/.opam/default/bin/jbuilder build -p core -j 3".

#=== ERROR while compiling core.v0.11.2 =======================================#
# context              2.0.0 | linux/arm64 | ocaml-base-compiler.4.07.0 | https://opam.ocaml.org/2.0#815ad398
# path                 ~/.opam/default/.opam-switch/build/core.v0.11.2
# command              ~/.opam/default/bin/jbuilder build -p core -j 3
# exit-code            1
# env-file             ~/.opam/log/core-8-283391.env
# output-file          ~/.opam/log/core-8-283391.out
### output ###
# [...]
# -> stdout:
# -> stderr:
# run: /tmp/ocaml-configurator0f1958/c-test-28/test.exe
# -> process exited with code 0
# -> stdout:
#  | ARCH_BIG_ENDIAN=b:false
#  | ARCH_SIXTYFOUR=b:true
# -> stderr:
# Fatal error: exception (runtime-lib/runtime.ml.E "comparison failed"
#   ((switch true) vs (switch false) (Loc src/config/discover.ml:205:15)))
# Raised at file "src/configurator.ml", line 511, characters 13-22
# Called from file "src/config/discover.ml", line 136, characters 2-1023

[abhi18av]

And here's mine

root@cub:~# opam install core
[WARNING] Running as root is not recommended
The following actions will be performed:
  ∗ install core v0.11.3

<><> Gathering sources ><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
[core.v0.11.3] found in cache

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
[ERROR] The compilation of core failed at "/root/.opam/default/bin/jbuilder build -p core -j 5".

#=== ERROR while compiling core.v0.11.3 =======================================#
# context     2.0.0 | linux/arm64 | ocaml-base-compiler.4.07.1 | https://opam.ocaml.org#b2024a11
# path        ~/.opam/default/.opam-switch/build/core.v0.11.3
# command     ~/.opam/default/bin/jbuilder build -p core -j 5
# exit-code   1
# env-file    ~/.opam/log/core-25713-05296d.env
# output-file ~/.opam/log/core-25713-05296d.out
### output ###
# [...]
# -> stdout:
# -> stderr:
# run: /tmp/ocaml-configurator711ca3/c-test-28/test.exe
# -> process exited with code 0
# -> stdout:
#  | ARCH_BIG_ENDIAN=b:false
#  | ARCH_SIXTYFOUR=b:true
# -> stderr:
# Fatal error: exception (runtime-lib/runtime.ml.E "comparison failed"
#   ((switch true) vs (switch false) (Loc src/config/discover.ml:205:15)))
# Raised at file "src/configurator.ml", line 511, characters 13-22
# Called from file "src/config/discover.ml", line 136, characters 2-1023



<><> Error report <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
┌─ The following actions failed
│ λ build core v0.11.3
└─
╶─ No changes have been performed

[kit-ty-kate]

Closing since this is fixed from v0.12.0 on.

[abhi18av]

Thanks, that's great to know :)

…

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